4 layers118 × 117 mm
Cm4-robot
Twisted-Fields/acorn-robot-electronics
PCB hardware designs in KICAD for Acorn, the precision farming rover from Twisted Fields.
268 parts81
4 layers62 × 65.5 mm
Soft start
Twisted-Fields/acorn-robot-electronics81PCB hardware designs in KICAD for Acorn, the precision farming rover from Twisted Fields.
- Size
- 62 × 65.5 mm
- Copper layers
- 4
- Thickness
- 1.61 mm
- Parts
- 65
- Nets
- 56
- Pads
- 225
- Tracks, vias
- 436, 79
- Pours
- 13
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 31 Jan 2021
- Updated
- 3 Aug 2024
Overview
Soft start is an open-source printed circuit board by Twisted-Fields, from the Twisted-Fields/acorn-robot-electronics repository on GitHub. It is a 4-layer board of 62 × 65.5 mm with 65 parts on 56 nets, routed with 436 tracks and 79 vias.
It is built around the RP2040, W25Q128JVSIQ and USBLC6-4SC6, with the 1N4148WS and SS310 among its other parts. Its parts include 19 capacitors, 13 resistors, 6 transistors, 5 ICs and 5 diodes. It belongs with the robots and motor control boards and the RP2040 boards of this library.
Main components
5
RP2040
LQFN-56(7x7)12bit 133MHz 30 LQFN-56(7x7) Microcontrollers (MCU/MPU/SOC) ROHSRaspberry PiMicrocontrollers (MCU/MPU/SOC)
W25Q128JVSIQ
SOIC-8-208mil-40℃~+85℃ 100,000 cycles 120ms@(32KB) 128Mbit 133MHz 1uA 2.7V~3.6V 20 Years 3ms Power-on reset、Hardware write protection、Software write protection、Write enable latch、Absolute write protection SPI SOIC-8-208mil NOR FLASH ROHSWinbondNOR FLASH
USBLC6-4SC6
SOT-23-6-55℃~+125℃ 0.3pF 15V 300W@8/20us 4.7A@8/20us 5V 6V 80nA ESD Four channels IEC 61000-4-2、IEC 61000-4-5、IEC 61000-4-4 Unidirectional SOT-23-6 ESD and Surge Protection (TVS/ESD) ROHSTECH PUBLICESD And Surge Protection (TVS/ESD)
1N4148WS
SOD-3231.25V@150mA 100V 150mA 1uA@75V 200mW 2A 4ns Independent SOD-323 Switching Diodes ROHSJiangsu Changjing Electronics Technology (CJ)Switching Diodes
SS310
SMA(DO-214AC)-55℃~+150℃ 100V 3A 50uA@100V 80A 850mV@3A Independent SMA(DO-214AC) Schottky Diodes ROHShongjiachengSchottky Diodes
README
cm4_robot_board/README.mdAcorn Raspberry Pi Motherboard
About
This is the motherboard design used on Acorn, the precision farming rover from Twisted Fields.
This board provides motor control communication to four Odrive motor controllers via RS-485, e-stop control, motor power control, and more.
For more information please see http://community.twistedfields.com
Parts
65| Qty | Value | Footprint | References |
|---|---|---|---|
| 11 | 100n | Capacitor_SMD:C_0603_1608Metric | C4, C14, C15, C29, C30, C31, C33, C34, C35, C36, C37 |
| 4 | 100V 34A PMOS | Package_TO_SOT_SMD:TO-252-2 | Q3, Q4, Q5, Q6 |
| 4 | 50k 0.1% | Resistor_SMD:R_0603_1608Metric | R34, R35, R37, R38 |
| 4 | MountingHole | supercap:MountingHole_3.9mm_Plastite_#6 | H1, H2, H3, H4 |
| 2 | 10k | Resistor_SMD:R_1206_3216Metric | R1, R2 |
| 2 | 1N4148WS | Diode_SMD:D_SOD-323 | D28, D29 |
| 2 | 1u | Capacitor_SMD:C_0603_1608Metric | C16, C32 |
| 2 | 20p | Capacitor_SMD:C_0603_1608Metric | C1, C2 |
| 2 | 2k 2 watt | Resistor_SMD:R_2512_6332Metric | R3, R40 |
| 2 | 3mΩ | Resistor_SMD:R_2512_6332Metric | R13, R15 |
| 2 | 4.7uF 100V | Capacitor_SMD:C_1210_3225Metric | C5, C7 |
| 2 | 5.1k 0.1% | Resistor_SMD:R_0603_1608Metric | R36, R39 |
| 2 | Conn_01x02 | Connector_Anderson:PowerPole_PP45_1336G1_1x2_Horizontal | J4, J5 |
| 2 | LOGO | taylor_footprints:twisted_2 | G***, G*** |
| 2 | LOGO | taylor_footprints:twisted_icon | G***, G*** |
| 2 | LOGO | taylor_footprints:twisted | G***, G*** |
| 2 | Q_NMOS_GSD | Package_TO_SOT_SMD:SOT-23 | Q1, Q2 |
| 2 | Zener 10v | Diode_SMD:D_SOD-323 | D2, D33 |
| 1 | 1.1k | Resistor_SMD:R_0603_1608Metric | R8 |
| 1 | 10u | Capacitor_SMD:C_0805_2012Metric | C3 |
| 1 | 12MHz | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | Y1 |
| 1 | 47uF 63V solid | Capacitor_SMD:CP_Elec_8x10.5 | C6 |
| 1 | 47uH | Inductor_SMD:L_Chilisin_BMRB00060612 | L3 |
| 1 | Conn_01x06 | parts:Ckmtw-W-2510S06P_1x06_P2.54mm_Vertical | J2 |
| 1 | INA181A2 | Package_TO_SOT_SMD:SOT-23-6 | U7 |
| 1 | LD1117S33TR_SOT223 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U3 |
| 1 | Power Output | Connector_Anderson:PowerPole_PP45_1336G1_1x2_Horizontal | J3 |
| 1 | RP2040 | RP2040_minimal:RP2040-QFN-56 | U4 |
| 1 | SS310 | Diode_SMD:D_SMA | D1 |
| 1 | TestPoint | TestPoint:TestPoint_Loop_D2.60mm_Drill1.6mm_Beaded | TP1 |
| 1 | USBLC6-4SC6 | Package_TO_SOT_SMD:SOT-23-6 | U1 |
| 1 | W25Q128JVSIQ | Package_SO:SOIC-8_5.23x5.23mm_P1.27mm | U2 |
Questions
How big is the Soft start PCB?
It measures 62 × 65.5 mm and has 4 copper layers, 1.61 mm thick.
What parts does the Soft start use?
65 parts, built around the RP2040, W25Q128JVSIQ, USBLC6-4SC6 and 1N4148WS. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Soft start KiCad files?
From the Twisted-Fields/acorn-robot-electronics repository on GitHub, at the commit this page was made from: the board is soft_start/soft_start.kicad_pcb and its schematic cm4_robot_board/cm4-robot.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Soft start design in my own project?
Its repository states no licence, so its author keeps all rights: ask Twisted-Fields before reusing the design.
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